12th Oct 23
Talk with Benjamin Ng
Speaker: Benjamin Ng
Date: 20th of October, 2023
Time: 10:00 am
Place: Room A5.4
Presentation title: “Modulation and Coding Performance Optimization in NOMA systems and FTN Systems: Some Recent Results and Future Directions”
Benjamin Ng received the Ph.D. degree in electrical engineering from the University of Toronto. He previously held industrial position as senior systems engineer in the US, focusing on UWB and millimeter wave technologies. He is currently an Associate Professor in the Faculty of Applied Sciences at Macao Polytechnic University. He is also the programme coordinator of the MSc program in Big Data and IoT. His research interests include wireless communications and signal processing, with an emphasis on MIMO, NOMA, and machine learning technologies. He has published over 70 international conferences and journal papers.
Non-orthogonal-multiple-access (NOMA) and faster-than-Nyquist (FTN) transmission are two well-known highly spectral-efficient air-interface techniques which may become the key technologies for beyond-5G wireless systems and massive machine-type communications. In this talk, a brief overview of these two techniques will be provided. Some recent results by the speaker and his research team pertaining to the modulation and coding performance optimization in the NOMA and FTN context will be briefly discussed. They include: 1) the information-theoretic characterization in terms of the second-order achievable rates for the NOMA systems with finite-alphabet inputs and finite blocklength; 2) Capacity-achieving multidimensional constellation design for NOMA systems with multiple antennas, and 3) performance of polar-coded FTN system. Some novel ideas that lay the foundation of future works which are currently being pursued will also be introduced.